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. 2016 Feb 15;49(3):573–581. doi: 10.1021/acs.accounts.5b00540

Figure 2.

Figure 2

(a) Possible minimum-energy orientations and associated reorientation pathways, indexed from (i) to (v), for MA+ in MAPbI3, based on rotation (2) in panel (b). (b) Two modes of rotation of MA+: (1) rotation of CH3 or NH3; (2) rotation of MA+, swapping locations of C and N. Reproduced with permission from ref (37). Copyright 2015 Macmillan Publishers Ltd.: Nature Communications. (c) Temperature-dependent mean-squared displacement of hydrogen atoms in MAPbBr3 from neutron scattering. Reproduced with permission from ref (47). Copyright 2015 American Physical Society.